Manley Small Block Chevy 4.125-Inch Bore Dome Pistons

Features:

• Based on Standard 4.125'' bore block
• 23° Head Applications
• 2618 High Strength Alloy
• Lightweight Design
• Gas Ported .043'', .043'', 3mm Ring Grooves
• Thick deck for high horsepower applications
• Round Wire Locks Included
• Pressure Balance Groove
• Perfect Ring Groove to Skirt Squareness
• .927'' Dia. x 2.450'' Long x .150'' Wall Premium Chrome Moly Wrist Pin

   

  Piston Common Specs:
• Compression Ratio: 10.3:1 w/ 64cc Combustion Chamber & 4.000'' Stroke
• Dome Volume: 11.0cc Symmetrical Dome
• Crown Thickness: .200''
• Ring Thickness: Top Ring - .043'' Gas Ported (.200'' down); Second Ring - .043''; Oil Ring - 3mm
• Valve Notches: .310'' Intake, .200'' Exhaust
• Maximum Valve Sizes: 2.125'' Intake, 1.650'' Exhaust
• Maximum Fly Cut: .360'' Intake, .260'' Exhaust
• Valve Angle: 22°
• Pin Included: Premium Chrome Moly .927'' dia., 2.450'' long, .150'' wall
• Round Wire Locks: .061'' wide
• Recommended Piston Clearance: .005'' measured 1.100'' from bottom of the oil ring

   

  Technical Note: Compression ratios are calculated at .005'' deck clearance, a 4.160'' head gasket I.D. with a .040'' compressed thickness.